Ceramic blank filled with an organic compound with improved machining properties

Abstract

A dental ceramic blank comprising at least one organic compound, characterized in that the blank has an open-pore ceramic framework, wherein the open-pore ceramic framework is selected from an open-pore dental ceramic framework comprising zirconia, aluminum oxide, a mixed oxide comprising zirconia, and / or silicon carbide, wherein the open-pore ceramic framework contains 2 to 50 wt.% of at least one organic compound selected from a) comprising at least one polymerizable monomer and / or a mixture of polymerizable monomers, thermal initiators comprising peroxide and / or an azo compound or a redox system comprising a peroxide, and a reducing agent selected from ascorbic acid, an ascorbic acid derivative, barbituric acid or a barbituric acid derivative, sulfinic acid, a sulfinic acid derivative or a redox system (aa) barbituric acid or thiobarbituric acid or a barbituric acid or thiobarbituric acid derivative and (bb) at least one copper salt or copper complex and (cc) at least one compound with an ionic halogen atom, particularly preferably a redox system comprising 1-benzyl-5-phenylbarbituric acid, copper acetylacetonate and benzyldibutylammonium chloride, and / or b) a polymer of the aforementioned monomers polymerized in the blank with respect to the overall composition of the dental ceramic blank.

Description

[0001] A dental ceramic blank, in particular a filled milling blank, comprising at least one organic compound, such as a polymer polymerized in the blank, to improve the machining properties of the blank, wherein the blank has an open-pored ceramic framework comprising at least 2 to 50 wt.% of at least one organic compound with respect to the total composition of the dental ceramic blank, and a method for producing the blank. The milling blank according to the invention exhibits significantly improved material properties compared to unfilled, purely ceramic milling blanks that are milled in CAD / CAM processes for the production of prosthetic components.

[0002] CAD / CAM processes are computer-aided manufacturing methods for aesthetic prosthetic dental restorations, such as bridges and crowns. In CAD / CAM, the English abbreviations CAD stand for Computer Aided Design and CAM for Computer Aided Manufacturing.

[0003] In automated material-ablation processes, 3D workpieces are manufactured from CAD data using a CAM process. Common material-ablation processes include milling, drilling, cutting, chipping, melting, and / or at least two of these processes. In addition to established CAD / CAM methods, laser milling, a material removal process using laser beams, can also be used in the future to process blanks for the production of prosthetic dental restorations. To achieve the desired results, the material properties of the blanks must be specifically adapted to the laser milling process.

[0004] US 5,869,548 discloses silanized, porous resin-filled ceramic dental materials. US 5,676,745 relates to a process for producing porous ceramic, silanized materials and their infiltration. US 6,605,293 B1 discloses porous implants with infiltrable pores. EP 2 233 449 A1 relates to a process for producing dental ceramics using hot-melt inkjet printing. DE 41 41 632 A1 relates to an injection-moldable composition for producing ceramic green bodies.

[0005] The object of the invention was to develop a dental ceramic blank with improved material properties that allows for the automated production of individual prosthetic components from blanks. Preferably, the shrinkage of the processed blank during sintering should also be reduced, so that the formation of supporting structures, such as bridges between the milled blanks of the prosthetic components and the remaining blank, can be largely dispensed with. In particular, the processing properties with regard to fracture strength and / or the modulus of elasticity should be improved.

[0006] The problems of the invention are solved by the dental ceramic blank according to the invention, in particular the filled ceramic blank, according to claim 1, and by the method for producing the blank according to claim 10. Preferred embodiments of the blank are described in the dependent claims and in more detail in the description.

[0007] According to the invention, an open-pore ceramic matrix (synonymous with open-pore ceramic framework) of a partially sintered blank is infiltrated with at least one organic compound. After infiltration and solidification of the at least one compound, the ceramic framework exhibits improved material properties. The infiltration of the blank, as well as the open-pore ceramic framework, takes place in a bath of at least one liquid or gas-phase separable organic compound until the open-pore ceramic framework is completely saturated. Solidification occurs, for example, by polymerization of a liquid infiltrated monomer, a monomer mixture, or by cooling a molten wax. After machining of the blank, such as milling, the organic compound is burned out of the framework, i.e., the compound is pyrolyzed, so that the open-pore ceramic framework is exposed again.

[0008] The invention relates to a dental ceramic blank, in particular a partially sintered blank, such as a white blank, comprising at least one organic compound, wherein the blank has an open-pore ceramic framework comprising 2 to 50 wt.% of at least one organic compound with respect to the total composition of the dental ceramic blank, preferably comprising 5 to 25 wt.%, more preferably 10 to 25 wt.%, and particularly preferably 15 to 25 wt.% of at least one organic compound, preferably HEMA, polymers of HEMA, or a dental wax, with respect to the total composition. The blank according to the invention can also be referred to as a blank filled with at least one organic compound.

[0009] The open-pore ceramic framework of the blank preferably has an open-pore porosity of 10 to 80%, in particular of 20 to 70%, more preferably of 30 to 60%.

[0010] The open-pore ceramic framework of the blank preferably comprises zirconium dioxide, aluminum oxide, mixed oxide(s) comprising zirconium dioxide and zirconia, and / or silicon carbide. Zirconium dioxide is particularly preferred, especially with a zirconium dioxide content of 50 wt.% or greater, and more specifically with a zirconium dioxide content of 70 wt.% or greater. Alternatively, aluminum oxide with a content of 95 wt.% or greater, particularly 99.7 wt.% or greater, and more preferably 99.99 wt.% or greater, is preferred. Furthermore, particularly preferred ceramic frameworks comprise a zirconium dioxide content of 50 wt.% or greater than 100 wt.%.-% optionally additionally comprising magnesium, such as (Mg-PSZ, partially stabilized), MgO, zirconium dioxide (Y-TZP, partially stabilized) comprising Y₂O₃, zirconium dioxide HIP state (Y-TZP, partially stabilized) comprising Y₂O₃, ZrO₂ / Al₂O₃ mixed oxide, SiSiC, a silicon-infiltrated silicon carbide, sintered silicon carbide without free silicon, hot-pressed silicon carbide without free silicon. Preferably, ceramic frameworks are those containing zirconia, aluminum oxide, a mixed oxide comprising zirconia and zirconia, and / or silicon carbide of greater than or equal to 70 wt.% to 100 wt.%, in particular greater than or equal to 73 wt.%, preferably greater than or equal to 85 wt.%, greater than or equal to 90 wt.%, wherein the framework is preferably stabilized with a yttrium compound and / or magnesium oxide.

[0011] The invention relates to a ceramic blank comprising a ceramic framework, in particular an open-pore ceramic framework, comprising a zirconium dioxide content of 50 to 100 wt.%, in particular 70 to 100 wt.%, preferably 85 wt.% to 100 wt.%, and particularly preferably 90 to 100 wt.%, and optionally comprising a content of other metal oxides, semimetal oxides, silicon carbide, in particular one of the aforementioned, or mixtures thereof selected from yttrium, aluminum, magnesium, potassium, calcium, lithium, and optionally silicon, with a content of 0 to 50 wt.%, in particular 0 to 30 wt.%, preferably 0 to 15 wt.%, and particularly preferably 0 to 10 wt.%, wherein the total composition is 100 wt.%. Preferred other metal oxides and semimetal oxides are yttrium oxide, in particular Y₂O₃, MgO, and Al₂O₃.

[0012] A particularly preferred aspect of the invention is a ceramic blank comprising a ceramic framework, in particular an open-pore ceramic framework, comprising a zirconium dioxide content of 50 to 99.9 wt.%, in particular of 70 to 99.9 wt.%, preferably of 85 wt.% to 99.9 wt.%, particularly preferably of 90 to 99.9 wt.% or of 50 to 97 wt.%, and optionally comprising a content of other metal oxides, semimetal oxides, silicon carbide, in particular one of the aforementioned, or mixtures thereof selected from yttrium, aluminum, magnesium, potassium, calcium, lithium, and optionally silicon, with a content of 0.1 to 50 wt.% or of 3 to 50 wt.%, in particular of 0.1 to 30 wt.%, preferably of 0.1 to 15 wt.%, particularly preferably of 0.1 to 10 wt.%, wherein the total composition is 100 wt.%.According to further alternatives of the invention, the ceramic framework does not include feldspar or magnesium aluminate (MgAl2O4 spinel) or alternatively comprises a content of 0.001 to 5 wt.%.

[0013] A particularly preferred ceramic blank according to the invention comprises a ceramic framework, in particular an open-pore ceramic framework, comprising a zirconium dioxide content of 50 to 98 wt.%, in particular 70 to 98 wt.%, and a yttrium oxide content, in particular yttrium(III) oxide, of 0.01 wt.% to 20 wt.%, in particular 0.1 to 15 wt.%, in particular 1 to 15 wt.%, and optionally or alternatively a magnesium oxide content of 0.01 to 10 wt.%, in particular 0.1 to 5 wt.%, and / or optionally an aluminum oxide content, in particular Al2O3, of 0.01 to 30 wt.%, in particular 0.1 wt.% to 25 wt.%. Typical ceramic frameworks according to the invention comprise ZrO2 / Y2O3 with a content of 95 wt.% ZrO2 and 5 wt.% Y2O3 or ZrO2 / Y2O3 / Al2O3 with a content of approximately 95 wt.% ZrO2 and approximately 20 wt.% Y2O3 and approximately 0.25 wt.% Al2O3; ZrO2 / Al2O3 / Y2O3 with a content of approximately 76 wt.% ZrO2 and 20 wt.%-% Al2O3 and 4 wt% Y2O3; ZrO2 / Y2O3 with a content of approximately 90 wt% ZrO2 and 10 wt% Y2O3; ZrO2 / MgO with a content of approximately 96.5 wt% ZrO2 and 3.5 wt% MgO.

[0014] The at least one organic compound preferably comprises a) at least one polymerizable monomer and / or a mixture of polymerizable monomers, preferably comprising liquid polymerizable monomers, and / or b) polymers, in particular polymers of the aforementioned monomers, and / or c) wax, in particular a liquefiable wax, especially a wax that liquefies without decomposition. Suitable waxes include, for example, adhesive waxes, milling waxes, and universal waxes known to those skilled in the art, such as, in particular, waxes containing paraffin.

[0015] The blank according to the invention can then preferably be used in an automated milling process with significantly less material waste, since its fracture strength and modulus of elasticity allow the blanks to withstand milling much better without chipping of parts of the blank during the milling process. Furthermore, the use of webs between the molded part and the remaining blank, which are intended to prevent distortion of the molded parts during the subsequent sintering process, can often be omitted in the blanks according to the invention. The sintering of the molded parts generally takes place at temperatures of 1000 to 1500 °C.

[0016] Particularly preferably, this comprises at least one monomer 2-hydroxymethacrylate or a mixture with 2-hydroxymethacrylate. Further preferred monomers include a) at least one polymerizable monomer and / or mixtures of polymerizable monomers, wherein the monomer is selected from monofunctional monomers comprising 2-hydroxyethyl methacrylate (HEMA, glycol methyl acrylate), alkyl methacrylates, (methyl) methacrylate and / or at least one di-, tri-, tetra- or multi-functional monomer 1,4-butanediol dimethacrylate (1,4-BDMA) or pentaerythritol tetraacrylate, bis-GMA monomer (bisphenyl A glycidyl methacrylate), triethylene glycol dimethacrylate (TEGDMA) and diethylene glycol dimethacrylate (DEGMA), tetraethylene glycol di(meth)acrylate, propoxylated neopentyl glycol diacrylate, alkyldiol di(meth)acrylate with C2 to C15 in the alkyl group, decanediol di(meth)acrylate, Dodecanediol di(meth)acrylate, hexyldecanediol di(meth)acrylate, trimethylolpropane tri(meth)acrylate,Pentaerythritol tetra(meth)acrylate, butanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, ethoxylated / propoxylated bisphenol A di(meth)acrylates, tris-(2-hydroxyethyl) isocyanaurate triacrylate, urethane (meth)acrylate, such as bis(methacryloxy-2-ethoxycarbonylamino)alkylenes, with alkylenes of 2 to 15 carbon atoms, UDMA, a mixture containing at least one of these (meth)acrylates and / or polymers and / or copolymers comprising one or at least two of the aforementioned monomers. Suitable alkyl methacrylates include methyl, ethyl, n-propyl, i-propyl, n-butyl, t-butyl, i-butyl, benzyl, and furfuryl methacrylates or mixtures thereof. Methyl methacrylate is particularly preferred.

[0017] Particularly preferred polymers than the at least one organic compound are obtainable by polymerization of at least one of the aforementioned monomers or a mixture comprising at least two of the aforementioned monomers.

[0018] Furthermore, the monomers may be combined with thermal initiators, such as peroxides or azo compounds.

[0019] The wax may preferably be selected from dental waxes, in particular comprising paraffin, ceresin, carnauba wax, cocoa butter, beeswax, stearic acid and / or microcrystalline, paraffinic hydrocarbon waxes. Preferably, the wax has a melting point of 140 °C or higher, in particular 145 °C or higher. These high-melting-point waxes are particularly well suited for infiltration of milling blanks. Alternatively, the wax may have a melting point of 50 °C to 100 °C or 100 °C to 139 °C.

[0020] The blank according to the invention is preferably a white blank, a gudgeon blank or a blank in the hot isostatically pressed (HIP) state; preferably the blank is a white blank.

[0021] Furthermore, the blank according to the invention preferably has a tensile strength greater than or equal to 41 N / mm². 2 and / or a modulus of elasticity greater than or equal to 37 N / mm² 2 The tensile strength is measured according to the 4-point bending test DIN EN ISO 6872:2008. Furthermore, a blank with at least one polymer as an organic compound exhibits a tensile strength greater than or equal to 60 N / mm². 2 on, especially greater than or equal to 70 N / mm 2 , greater than or equal to 80 N / mm 2 , greater than or equal to 90 N / mm 2 , and / or a modulus of elasticity greater than or equal to 37 N / mm² 2 on, especially greater than or equal to 40 N / mm 2 , preferably greater than or equal to 45 N / mm 2 , especially preferably greater than or equal to 50 N / mm 2 , measured according to 4-point bending test DIN EN ISO 6872:2008.

[0022] A blank according to the invention is particularly well suited for the production of at least one prosthetic dental or medical blank of a molded part, such as a blank blank, using a material-removing process, in particular a CAD / CAM process, comprising milling, drilling and / or cutting operations and / or material removal by laser. Consequently, the invention relates to milling blanks and blanks for material removal by laser. The blanks of dental molded parts are subsequently sintered.

[0023] The invention also relates to a method for producing a blank and a blank obtainable by the method, comprising at least one organic compound, by (i) bringing a blank with an open-pore ceramic framework into contact with at least one liquid or gas-phase depositionable organic compound, and (ii) incorporating the open-pore ceramic framework of the blank into at least one organic compound in relation to the total composition of the dental ceramic blank to a weight of 2 to 50 wt.%.

[0024] It is preferred if the blank is infiltrated with at least one liquid organic compound or if at least one organic compound that can be separated from the gas phase is condensed in the blank.

[0025] The process step (i), in which a blank with an open-pore ceramic framework is brought into contact with at least one liquid or gas-phase depositionable organic compound, can be carried out by infiltration under a pressure of 1.1 to 10 kbar, preferably 2 to 10 bar, or alternatively, the open-pore framework is evacuated beforehand, in particular by incubating the open-pore framework in a vacuum at 10 -5 bar to 0.9 bar, especially 10 -3 bar to 0.1 bar, is brought into contact with at least one liquid or gas-phase separable organic compound.

[0026] Furthermore, it is preferred if the open-pore ceramic framework of the blank has an open-pore porosity of 10 to 80%, in particular an open-pore porosity of 20 to 70%, preferably 20 to 50%, alternatively a porosity of approximately 25% + / - 5%.

[0027] The aforementioned organic compound comprises the aforementioned a) at least one polymerizable monomer and / or mixtures of polymerizable monomers, and / or b) polymers, in particular the monomers from a), and / or c) at least one wax.

[0028] According to the invention, it is preferred if the organic compound comprises at least one monomer and (ii) is polymerized or the organic compound comprises a liquid wax which (iii) is solidified, in particular cooled.

[0029] The invention also relates to the use of a liquid, polymerizable monomer, a mixture of polymerizable monomers and / or a wax, as listed above, for infiltration of an open-pore dental ceramic, in particular an open-pore ceramic framework of the blank, especially for the production of a blank filled with at least one organic compound.

[0030] Suitable initiators include a) peroxide and / or azo compound, in particular LPO: dilauroyl peroxide, BPO: dibenzoyl peroxide, t-BPEH: tert-butyl per-2-ethylhexanoate, AIBN: 2,2'-azobis-(isobutyronitrile), DTBP: di-tert-butyl peroxide, and optionally b) at least one activator, in particular at least one aromatic amine, such as N,N-dimethyl-p-toluidine, N,N-dihydroxyethyl-p-toluidine and / or p-dibenzylaminobenzoic acid diethyl ester, or at least one initiator system selected from redox systems, in particular a combination selected from dibenzoyl peroxide, dilauroyl peroxide and camphorquinone with amines selected from N,N-dimethyl-p-toluidine, N,N-dihydroxyethyl-p-toluidine and p-dimethylaminobenzoic acid diethyl ester, or a redox system comprising a peroxide, and a reducing agent selected from ascorbic acid, an ascorbic acid derivative, barbituric acid or a barbituric acid derivative, sulfinic acid, a sulfinic acid derivative, particularly preferably a redox system comprising (i) barbituric acid or thiobarbituric acid or a barbituric acid or thiobarbituric acid derivative and (ii) at least one copper salt or copper complex and (iii) at least one compound with an ionic halogen atom, a redox system comprising 1-benzyl-5-phenylbarbituric acid, copper acetylacetonate, and benzyldibutylammonium chloride is particularly preferred. Polymerization in the two-component dental material is particularly preferably initiated via a barbituric acid derivative.

[0031] In the following, exemplary embodiments of the invention are explained with reference to schematically represented figures and embodiments, without, however, limiting the invention. These show: Fig.Figure 1: Schematic representation of an open-pored ceramic framework 2 filled with an organic compound 1. During sintering at 1000 to 1500 °C, the organic compound is pyrolyzed, leaving the open-pored ceramic framework essentially free of the organic compound.

[0032] Zirconia in its white state (open porosity) was infiltrated with a curable liquid. Various infiltration materials were tested, with the monomer being: HEMA: 99,5 % Interrox TBPEH: 0.5% (liquid hydrogen peroxide)

[0033] The greatest increase in strength was achieved, as demonstrated by the 4-point bending test according to DIN EN ISO 6872:2008. A zirconia blank with a diameter of 100 mm and a height of 14 mm was infiltrated with HEMA. The blank was infiltrated in a bath of the respective liquid or organic compound until the open-pore ceramic framework was completely saturated. The blank was then placed in the monomer and subsequently cured at 90°C.

[0034] Infiltration time: 2h Curing time at 90°C: 3h

[0035] Weight difference: blank White state Infiltrated white condition 1 342,010g 387,610g 2 341,776g 380,559g Bending strengths: Example 1:

[0036] ZrO2 translucent white, milled samples. Unsintered, infiltrated pink. Table 1a: Nr Sample thickness mm Sample width mm F max N Breaking strength N / mm 2 E-ModkN / mm 2 1 3,001 4,004 117,8 73,53 43 2 3,006 4,002 145,8 90,69 60 3 3,006 4,003 127,0 78,98 56 4 3,006 4,002 141,1 87,73 56 5 3,005 4,004 143,3 89,09 57 6 3,000 4,004 123,1 76,58 52 7 3,006 4,005 114,4 71,14 54 8 3,006 4,005 132,7 82,48 52 9 3,006 4,005 134,9 83,87 52 10 3,005 4,006 162,3 100,85 62 11 3,005 4,006 133,9 83,26 54 12 3,006 4,004 146,8 91,28 56 13 3,005 4,003 111,0 69,06 51 14 3,005 4,004 169,2 105,28 40 Table 1b: Series = 14 F maxN Breaking strength N / mm 2 E-ModkN / mm 2 X 135,9 84,56 53 Example 2:

[0037] ZrO2 translucent white, milled samples. Unsintered, infiltrated white Table 2a: Nr Sample thickness mm Sample width mm F max N Breaking strength N / mm 2 E-ModkN / mm 2 1 3,006 4,005 153,3 95,33 62 2 3,002 4,003 165,0 102,89 59 3 3,006 4,005 164,6 102,35 56 4 3,005 4,005 167,5 104,24 60 5 3,006 4,004 145,2 90,27 58 6 3,006 4,004 163,5 101,68 58 7 3,006 4,006 145,8 90,60 59 8 3,000 4,006 171,3 106,43 58 9 3,006 4,006 125,8 78,17 60 10 3,005 4,005 138,3 86,02 59 11 3,007 4,003 159,5 99,17 59 12 3,003 4,005 133,2 82,97 58 13 3,003 4,005 124,6 77,60 55 14 3,005 4,005 161,4 100,43 54 Table 2b: Series = 14 F maxN Breaking strength N / mm 2 E-ModkN / mm 2 X 151,4 94,15 58 Example 3:

[0038] ZrO2 translucent white, milled samples. Unsintered, unprocessed, wax. Table 3a: Nr Sample thickness mm Sample width mm F max N Breaking strength N / mm 2 E-ModkN / mm 2 1 3,026 4,068 76,8 46,42 37 2 3,019 4,070 71,9 43,58 39 3 3,028 4,088 74,5 44,73 39 4 3,026 4,061 74,2 44,88 40 5 3,023 4,063 67,7 41,03 40 6 3,025 4,091 81,7 49,09 40 7 3,040 4,063 81,9 49,09 40 8 3,012 4,065 78,8 47,59 37 9 3,016 4,078 72,0 43,69 38 10 3,021 4,080 67,9 41,02 37 11 3,027 4,083 70,9 42,64 37 12 3,025 4,067 79,8 48,23 35 Table 3b: Series = 12 F maxN Breaking strength N / mm 2 E-ModkN / mm 2 X 74,8 45,17 38 Example 4:

[0039] ZrO2 translucent white, milled samples. Unsintered, unprocessed. Table 4a: Nr Sample thickness mm Sample width mm F maxN Breaking strength N / mm 2 E-ModkN / mm 2 1 3,018 4,068 64,4 39,13 36 2 3,020 4,068 67,9 41,17 35 3 3,021 4,077 67,2 40,64 35 4 3,023 4,070 62,9 38,05 36 5 3,006 4,081 66,9 40,79 36 6 3,019 4,062 66,3 40,26 35 7 3,024 4,062 63,5 38,46 35 8 3,022 4,065 69,7 42,24 35 9 3,014 4,069 65,6 39,96 36 10 3,023 4,067 69,4 42,04 35 11 3,020 4,067 67,3 40,88 35 12 3,015 4,067 62,4 37,96 35 13 3,018 4,072 66,8 40,50 35 14 3,024 4,060 67,7 41,04 35 Table 4b: Series = 14 F maxN Breaking strength N / mm 2 E-ModkN / mm 2 X 66,3 40,22 35

Claims

[1] Dental ceramic blank comprising at least one organic compound, characterized by that the blank has an open-pore ceramic framework, wherein the open-pore ceramic framework is selected from an open-pore dental ceramic framework comprising zirconia, aluminum oxide, mixed oxide comprising zirconia, and / or silicon carbide, wherein the open-pore ceramic framework comprises 2 to 50 wt.% of at least one organic compound selected from a) comprising at least one polymerizable monomer and / or a mixture of polymerizable monomers, thermal initiators comprising peroxide and / or an azo compound or a redox system comprising a peroxide, and a reducing agent selected from ascorbic acid, an ascorbic acid derivative, barbituric acid or a barbituric acid derivative, sulfinic acid, a sulfinic acid derivative or a redox system (aa) barbituric acid or thiobarbituric acid or a barbituric acid or thiobarbituric acid derivative and (bb) at least one copper salt or copper complex and (cc) at least one compound with an ionic halogen atom, particularly preferably a redox system comprising 1-benzyl-5-phenylbarbituric acid, copper acetylacetonate and benzyldibutylammonium chloride, and / or b) a polymer of the aforementioned monomers polymerized in the blank with respect to the overall composition of the dental ceramic blank. [2] Blank according to claim 1, characterized by that at least one organic compound is selected from a) at least one polymerizable monomer and / or mixture of polymerizable monomers, wherein the monomer is selected from monofunctional monomers comprising 2-hydroxyethyl methacrylate (HEMA, glycol methyl acrylate), alkyl methacrylates, (methyl) methacrylate and / or at least one di-, tri-, tetra- or multi-functional monomer 1,4-butanediol dimethacrylate (1,4-BDMA) or pentaerythritol tetraacrylate, bis-GMA monomer (bisphenyl A glycidyl methacrylate), triethylene glycol dimethacrylate (TEGDMA) and diethylene glycol dimethacrylate (DEGMA), tetraethylene glycol di(meth)acrylate, propoxylated neopentyl glycol diacrylate, alkyldiol di(meth)acrylate with C2 to C15 in the alkyl group, decanediol di(meth)acrylate, dodecanediol di(meth)acrylate, Hexyldecane diol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tetra(meth)acrylate as well as butanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, ethoxylated / propoxylated bisphenol A di(meth)acrylate,Tris-(2-Hydroxyethyl)isocyanaurate triacrylate, urethane (meth)acrylate, such as bis(methacryloxy-2-ethoxycarbonylamino)alkylenes, with alkylenes of 2 to 15 carbon atoms, UDMA, a mixture containing at least one of these (meth)acrylates and / or polymers and / or copolymers comprising one or at least two of the aforementioned monomers, and / or b) polymers obtainable by polymerization of at least one of the aforementioned monomers or a mixture comprising at least two of the aforementioned monomers. [3] blank according to claim 1 or 2, characterized by that the blank contains at least one organic compound to a weight of 5 to 25% in relation to the total composition. [4] Blank according to one of claims 1 to 3, characterized by that the blank is a white blank, a gudgeon blank or a blank in the hot isostatically pressed (HIP) state, preferably the blank is a white blank. [5] Blank according to any one of claims 1 to 4, characterized bythat the blank has a breaking strength greater than or equal to 41 N / mm² 2 and / or a modulus of elasticity greater than or equal to 37 N / mm² 2 exhibits, as measured according to 4-point bending test DIN EN ISO 6872:2008. [6] Blank according to any one of claims 1 to 5, characterized by that the blank is suitable for the production of at least one prosthetic dental or medical blank, a molded part in a material-removing process, in particular a CAD / CAM process, comprising milling, drilling and / or cutting processing and / or material removal by means of a laser. [7] Blank according to any one of claims 1 to 6, characterized by that the open-pore ceramic framework has an open-pore porosity of 10 to 80%, in particular an open-pore porosity of 20 to 70%, preferably of 20 to 60%. [8] Method for producing a blank comprising at least one organic compound according to any one of claims 1 to 7, by (i) a blank with an open-pore ceramic framework, wherein the open-pore ceramic framework is selected from an open-pore dental ceramic framework comprising zirconia, aluminum oxide, a mixed oxide comprising zirconia, and / or silicon carbide, with at least one liquid or gas-depositable organic compound selected from a) at least one polymerizable monomer and / or a mixture of polymerizable monomers comprising thermal initiators comprising peroxide and / or an azo compound or a redox system comprising a peroxide and a reducing agent selected from ascorbic acid, an ascorbic acid derivative, barbituric acid or a barbituric acid derivative, sulfinic acid, a sulfinic acid derivative or a redox system (aa) barbituric acid or thiobarbituric acid or a barbituric acid or thiobarbituric acid derivative and (bb) at least one copper salt or copper complex and (cc) at least one compound with an ionic halogen atom, particularly preferably a redox system comprising 1-benzyl-5-phenylbarbituric acid, copper acetylacetonate and benzyldibutylammonium chloride, is brought into contact, and (ii) the open-pore ceramic framework of the blank incorporates at least one organic compound in relation to 2 to 50 wt.% of the total composition of the dental ceramic blank. [9] Method according to claim 8, characterized by that the blank is infiltrated with at least one liquid organic compound or that at least one organic compound that can be separated from the gas phase is condensed in the blank. [10] Method according to claim 8 or 9, characterized bythat the open-pore ceramic framework of the blank has an open-pore porosity of 10 to 80% and is infiltrated with at least one liquid organic compound or at least one gas-phase detachable organic compound is condensed in the blank. [11] Method according to any one of claims 8 to 10, characterized by , that (iii) the organic compound comprises a) at least one polymerizable monomer and / or mixture of polymerizable monomers and / or, b) Polymers. [12] Method according to any one of claims 8 to 11, characterized by , that (iii) the organic compound is polymerized. [13] Blank obtainable by a method according to any one of claims 8 to 12. [14] Use of a liquid polymerizable monomer, a mixture of polymerizable monomers comprising a) at least one polymerizable monomer and / or mixture of polymerizable monomers, wherein the monomer is selected from monofunctional monomers comprising 2-hydroxyethyl methacrylate (HEMA, glycol methyl acrylate), alkyl methacrylates, (methyl) methacrylate and / or at least one di-, tri-, tetra- or multi-functional monomer 1,4-butanediol dimethacrylate (1,4-BDMA) or pentaerythritol tetraacrylate, bis-GMA monomer (bisphenyl A glycidyl methacrylate), triethylene glycol dimethacrylate (TEGDMA) and diethylene glycol dimethacrylate (DEGMA), tetraethylene glycol di(meth)acrylate, propoxylated neopentyl glycol diacrylate, alkyldiol di(meth)acrylate with C2 to C15 in the alkyl group, decanediol di(meth)acrylate, dodecanediol di(meth)acrylate, Hexyldecane diol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tetra(meth)acrylate as well as butanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, ethoxylated / propoxylated bisphenol A di(meth)acrylate,Tris-(2-Hydroxyethyl)isocyanaurate triacrylate, urethane (meth)acrylate, such as bis(methacryloxy-2-ethoxycarbonylamino)alkylenes, with alkylenes of 2 to 15 carbon atoms, UDMA, a mixture containing at least one of these (meth)acrylates and / or polymers and / or copolymers comprising one or at least two of the aforementioned monomers, comprising thermal initiators comprising peroxide and / or azo compound or a redox system comprising a peroxide, and a reducing agent selected from ascorbic acid, ascorbic acid derivative, barbituric acid or a barbituric acid derivative, sulfinic acid, sulfinic acid derivative or a redox system (aa) barbituric acid or thiobarbituric acid or a barbituric acid or thiobarbituric acid derivative and (bb) at least one copper salt or copper complex and (cc) at least one compound with an ionic halogen atom, particularly preferably a redox system comprising 1-benzyl-5-phenylbarbituric acid, copper acetylacetonate and benzyldibutylammonium chloride, b) Polymers obtainable by polymerization of at least one of the aforementioned monomers or of a mixture comprising at least two of the aforementioned monomers, for infiltration of an open-pore dental ceramic selected from an open-pore ceramic framework of a blank comprising zirconia, aluminium oxide, mixed oxide comprising zirconia, and / or silicon carbide.

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